DEBT - Schedule of Long-Term Debt (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Total debt	$ 1,403,169,000	$ 1,356,084,000
Less: current portion of total debt	107,577,000	87,781,000
Long-term portion of total debt	1,295,592,000	1,268,303,000
Obligations under capital leases
Debt Instrument [Line Items]
Total debt	6,975,000	5,234,000
$1 billion senior credit facility weighted average rate 2.02%, due in 2016
Debt Instrument [Line Items]
Total debt	230,882,000	225,931,000
$100 million private placement notes 5.64%, due in 2015
Debt Instrument [Line Items]
Total debt	100,000,000	100,000,000
$175 million private placement notes 3.89%, due in 2017
Debt Instrument [Line Items]
Total debt	175,000,000	175,000,000
$125 million private placement notes 2.68%, due in 2019
Debt Instrument [Line Items]
Total debt	125,000,000	125,000,000
$225 million private placement notes 4.47%, due in 2020
Debt Instrument [Line Items]
Total debt	225,000,000	225,000,000
$125 million private placement notes 3.26%, due in 2022
Debt Instrument [Line Items]
Total debt	125,000,000	125,000,000
Acquisition notes weighted average rate of 2.22% and weighted average maturity of 3.5 years
Debt Instrument [Line Items]
Total debt	280,818,000	235,856,000
Foreign bank debt weighted average rate 5.21% and weighted average maturity of 1.4 years
Debt Instrument [Line Items]
Total debt	$ 134,494,000	$ 139,063,000